The Board may, in its discretion, designate itself, one or more of its members, or an authorized officer, to act as presiding officer in a formal hearing. In such a proceeding, the authority of Board or its designee will include all the authority provided to an ALJ under this part. Proposed findings and conclusions, briefs, and other submissions by the parties permitted in subpart A of this part must be filed with the Secretary for consideration by the Board. Sections 263.38 and 263.39 will not apply to proceedings conducted under this section.